Utility fabric mix Poplin VestUtility Vest Fabric Mix Poplin is reinforced with woven tapes along all the raw edges. A wider herringbone tape is placed across the chest and the back panel. This vest offers three roomy flap pockets at the front, created with a woven tab and Velcro closure. Also those edges are finished with tape. Ventilation is created at the upper back panel, where a mesh fabric is set. The inside shows an A shape woven tape construction for reinforcement.